EP1315920A1 - Conveying unit - Google Patents
Conveying unitInfo
- Publication number
- EP1315920A1 EP1315920A1 EP01969531A EP01969531A EP1315920A1 EP 1315920 A1 EP1315920 A1 EP 1315920A1 EP 01969531 A EP01969531 A EP 01969531A EP 01969531 A EP01969531 A EP 01969531A EP 1315920 A1 EP1315920 A1 EP 1315920A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- feed unit
- bearing
- unit according
- spindle nut
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/06—Means for converting reciprocating motion into rotary motion or vice versa
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H2025/2062—Arrangements for driving the actuator
- F16H2025/2075—Coaxial drive motors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/306664—Milling including means to infeed rotary cutter toward work
- Y10T409/307672—Angularly adjustable cutter head
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T409/00—Gear cutting, milling, or planing
- Y10T409/30—Milling
- Y10T409/309576—Machine frame
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
- Y10T74/18576—Reciprocating or oscillating to or from alternating rotary including screw and nut
- Y10T74/18648—Carriage surrounding, guided by, and primarily supported by member other than screw [e.g., linear guide, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T74/00—Machine element or mechanism
- Y10T74/18—Mechanical movements
- Y10T74/18568—Reciprocating or oscillating to or from alternating rotary
- Y10T74/18576—Reciprocating or oscillating to or from alternating rotary including screw and nut
- Y10T74/18664—Shaft moves through rotary drive means
Definitions
- the invention relates to a feed unit with a rod-shaped actuator, which is arranged in a housing and is axially displaceably guided relative to this, and with a drive motor, which causes the displacement of the actuator via a drive device rotatably held in the housing, which has a threaded spindle and a contains this surrounding spindle nut.
- Feed units can serve as a rigid and variable-length connection between two articulation points. They can be used in various fields of technology, for example also in machine tools known as "parallel kinematic machines" (PKM).
- PPM parallel kinematic machines
- the length of a feed unit can be specifically changed by the integrated drive and a measuring system
- the action of the feed unit is comparable to that of an extendable strut, and a parallel kinematic machine can be built with three or six such units.
- a feed unit of the type mentioned is known, which is provided as a power actuating device with a lifting mechanism for a cab tilting device of a truck.
- a rotary drive gear mechanism with a motor is assigned to the lifting mechanism, the motor being located outside the housing for the actuator. Therefore, this device has a complicated construction, is not free of play and axially little stiff, and requires a large space, which makes it unsuitable for use on a machine tool.
- the invention is based on the object of creating a simply constructed feed unit which forms a compact, ready-to-install component.
- the drive motor with its stator and its rotor is arranged in the housing and the spindle nut is arranged and fastened coaxially in a hollow shaft which is surrounded by and fixed to the rotor.
- the spindle nut is arranged and fastened coaxially in a hollow shaft which is surrounded by and fixed to the rotor.
- the hollow shaft can be rotatably arranged in a fixed bearing in the region of the spindle nut and in a floating bearing in an end region of the housing.
- the fixed bearing can be designed as an axial angular contact ball bearing and can be axially supported in the region of a joint axis for the housing.
- the housing can have a flange body and the hollow shaft can have an integrally formed flange for the axial support of the fixed bearing.
- the floating bearing can be designed as a needle bearing.
- the mounting of the drive motor and the threaded spindle form a unit and enable an optimal flow of force.
- the bearing is thermally neutral, so that the distance from one pivot point to the other pivot point of the feed unit is not affected by the engine heat.
- the construction of the Unit can be chosen so that its center of gravity is on an articulation axis of the unit in order to minimize moments around the articulation axis.
- Figure 1 shows a feed unit according to the invention in longitudinal section
- Figure 2 is a schematic representation of a machine tool on which feed units according to the invention can be installed.
- a feed unit according to the invention shown in FIG. 1, which is also referred to as a module, has a threaded spindle 1, which is partly located in a housing 2 and can be moved out of it in a longitudinally displaceable manner.
- the threaded spindle 1 is surrounded by a spindle nut 3, which is driven by a drive motor 4.
- This has a stand 5 fastened to a housing wall and a rotor 6 arranged inside the stand, which concentrically surrounds a hollow shaft 7 and is fastened thereon.
- the spindle nut 3 is rotatably mounted in a fixed bearing 8, which is designed as an axial angular contact ball bearing.
- This bearing is located centrally to the spindle nut 3 and symmetrically to an articulated axis 9 of the feed unit, which is perpendicular to the longitudinal axis of the threaded spindle 1. It is fastened in a flange body 10 of the housing 2.
- the inner ring of the fixed bearing 8 also bears axially against a flange 11 of the hollow spindle 7.
- the flange body 10 has bores for receiving axle journals of a shoulder joint.
- the spindle nut 3 and the fixed bearing 8 are preloaded units.
- a floating bearing 12 is also arranged in the housing 2, which is designed as a needle bearing and is arranged in the housing 2 at one end thereof. Accordingly, the positioning accuracy of the module is not affected by thermal expansion of the hollow shaft as a result of the heat introduced by the motor.
- the fixed bearing 8 and the hinge axis 9 can be positioned in the center of gravity of the feed unit, also referred to as a module, in order to avoid an imbalance when rotating about the hinge axis 9. Due to the bearing arrangement directly on the spindle nut 3 in the area of the joint axis 9 and the high rigidity achieved thereby, the starting conditions for a high natural frequency of the system and a low running noise are also given.
- the fixed bearing 8 and the floating bearing 12 serve at the same time to support the rotor 6 of the drive motor 4 and the spindle nut 3, which guides the threaded spindle 1.
- the module is ready for installation as a complete unit with motor, brake, measuring system and bearing for parallel kinematics machines.
- a tool holder 14 can be moved into any desired position in space.
- the machine is provided with a plurality of feed units, each of which consists of extendable arms 17 which are formed into one another and which are inserted into one another, tubes 15 and 16. me 14 are articulated.
- the tool holder 14 is provided with a tool, not shown, which is driven by a motor 19.
- the tool holder 14 can be moved into any desired position in space by retracting or extending one or more arms 17.
- feed units according to the invention can be used as extendable arms.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
- General Details Of Gearings (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10044733 | 2000-09-09 | ||
DE10044733A DE10044733A1 (en) | 2000-09-09 | 2000-09-09 | feed unit |
PCT/EP2001/008689 WO2002021019A1 (en) | 2000-09-09 | 2001-07-27 | Conveying unit |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1315920A1 true EP1315920A1 (en) | 2003-06-04 |
EP1315920B1 EP1315920B1 (en) | 2004-04-28 |
Family
ID=7655711
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01969531A Expired - Lifetime EP1315920B1 (en) | 2000-09-09 | 2001-07-27 | Conveying unit |
Country Status (5)
Country | Link |
---|---|
US (1) | US7047833B2 (en) |
EP (1) | EP1315920B1 (en) |
JP (1) | JP2004508514A (en) |
DE (2) | DE10044733A1 (en) |
WO (1) | WO2002021019A1 (en) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20030065091A (en) * | 2002-01-29 | 2003-08-06 | 박정근 | Electirc actuator with sensor and electric break that operated upon mathord of expantion itself |
US7389709B2 (en) * | 2004-06-30 | 2008-06-24 | Moog Inc. | Reverse transfer system ball-screw, and electro-mechanical actuator employing same |
KR101028247B1 (en) | 2008-10-14 | 2011-04-11 | 엘지이노텍 주식회사 | Step actuator |
DE102008051544B4 (en) * | 2008-10-14 | 2012-12-27 | Continental Automotive Gmbh | Spindle drive with anti-rotation lock |
KR101543673B1 (en) * | 2009-04-08 | 2015-08-12 | 엘지이노텍 주식회사 | Linear Stepping motor |
JP4982593B2 (en) * | 2010-07-09 | 2012-07-25 | 日本ムーグ株式会社 | Linear actuator and swing control device for railway vehicle |
CH712442A1 (en) * | 2016-05-09 | 2017-11-15 | Reishauer Ag | Gear processing machine with Einzentriervorrichtung. |
WO2019191104A1 (en) | 2018-03-27 | 2019-10-03 | Quio Technologies Llc | Autoinjector with a linear actuator having a hollow drive shaft |
CN109128872B (en) * | 2018-09-26 | 2019-09-17 | 燕山大学 | A kind of symmetrical parallel three NC axes main tapping can be realized multi-direction Fixed-point Motion of A |
DE102022115934B3 (en) | 2022-06-27 | 2023-10-19 | Carl Zeiss Smt Gmbh | Screw gear drive as well as reticle stage and measuring device for semiconductor lithography applications |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4412403C2 (en) | 1993-04-10 | 1997-06-19 | Thk Co Ltd | Electrical adjustment device |
Family Cites Families (20)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2307317A (en) * | 1938-01-12 | 1943-01-05 | Konig Carl | Means for obtaining relative movement of aircraft parts |
US2791128A (en) * | 1954-04-01 | 1957-05-07 | Gen Motors Corp | Rotary actuator |
US3336925A (en) * | 1965-07-09 | 1967-08-22 | Iii Lawrence K Thompson | Controlled medical injection apparatus |
US3691858A (en) * | 1969-10-10 | 1972-09-19 | Richard Wilke | Electromotive adjusting device |
DK105977A (en) * | 1977-03-11 | 1978-09-12 | P U Poulsen | MECHANISM FOR TRANSFORMING A ROTARY MOVEMENT INTO A FORWARD AND RETURNING MOVEMENT AND REVERSE |
US4463291A (en) | 1979-12-31 | 1984-07-31 | Andale Company | Automatic control system and valve actuator |
DE3507497C1 (en) * | 1985-03-02 | 1986-07-31 | PROMA Produkt- und Marketing-Gesellschaft mbH, 7310 Plochingen | Mechanical linear drive unit |
DE3690461T1 (en) * | 1985-09-07 | 1987-10-08 | ||
US4747319A (en) * | 1985-12-16 | 1988-05-31 | Jidosha Kiki Co., Ltd. | Actuator |
US5099161A (en) * | 1990-10-16 | 1992-03-24 | Savair Inc. | Compact electric linear actuator with tubular rotor |
US6362547B1 (en) * | 1994-05-23 | 2002-03-26 | Tri-Tech, Inc. | Linear/rotary motor and method of use |
US5639065A (en) * | 1995-09-18 | 1997-06-17 | Lin; Ching-Chung | Vehicle jack |
JPH10184844A (en) * | 1996-12-25 | 1998-07-14 | Smc Corp | Electric actuator |
US5895084A (en) * | 1997-02-19 | 1999-04-20 | Mauro; George | Cam operated microgripper |
JP3108389B2 (en) * | 1997-07-08 | 2000-11-13 | アイシン精機株式会社 | Rear wheel steering device |
JPH11299169A (en) | 1998-04-10 | 1999-10-29 | Yaskawa Electric Corp | Linear actuator |
JP4489199B2 (en) | 1999-01-29 | 2010-06-23 | オリエンタルモーター株式会社 | Linear actuator |
DE19904702B4 (en) * | 1999-02-05 | 2008-06-05 | Schaeffler Kg | Parallel kinematic machine |
ATE263323T1 (en) * | 1999-09-30 | 2004-04-15 | Danaher Motion Gmbh | LINEAR ACTUATOR |
JP4491702B2 (en) * | 2000-12-04 | 2010-06-30 | Smc株式会社 | Linear actuator |
-
2000
- 2000-09-09 DE DE10044733A patent/DE10044733A1/en not_active Withdrawn
-
2001
- 2001-07-27 WO PCT/EP2001/008689 patent/WO2002021019A1/en active IP Right Grant
- 2001-07-27 DE DE50102160T patent/DE50102160D1/en not_active Expired - Lifetime
- 2001-07-27 EP EP01969531A patent/EP1315920B1/en not_active Expired - Lifetime
- 2001-07-27 US US10/380,019 patent/US7047833B2/en not_active Expired - Fee Related
- 2001-07-27 JP JP2002525397A patent/JP2004508514A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4412403C2 (en) | 1993-04-10 | 1997-06-19 | Thk Co Ltd | Electrical adjustment device |
Also Published As
Publication number | Publication date |
---|---|
JP2004508514A (en) | 2004-03-18 |
DE50102160D1 (en) | 2004-06-03 |
US20030167866A1 (en) | 2003-09-11 |
EP1315920B1 (en) | 2004-04-28 |
WO2002021019A1 (en) | 2002-03-14 |
US7047833B2 (en) | 2006-05-23 |
DE10044733A1 (en) | 2002-03-21 |
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